Ventilating-cap for inlet of air.



No. 648,225. Patnied Apr. 24, i900.-

E."A. WIMAN. VENTILATING GAP FOR INLET OF AIR.

(Application filed Oct. 25, 1898.)

(No Model.)

IIIIIII mm WHNESSES: INVENTOR a? 9% 7 ZATTORNEY Eric.

ERNST AUGUST WVIMAN, OF STOOKHOLM, SW'EDEN,

VENTlLATING-CAP FOR INLET OF AIR.

SPECIFICATION forming part of Letters Patent No. 648,225, dated April24, 1900. Application filed'Octoher 25,1898. Serial No. 694,521.(Nomodeh) To ctZZ whom it may concern..."

Be it known that LERNsT AUGUST WlMAN, a subject of the King of Swedenand Norway, and a resident of Stockholm, Sweden, have invented certainnew and useful Improvements in Ventilating-Caps for Air-Inlets, of whichthe following is a specification. 1

This invention relates to ventilating devices adapted to be mounted onair-inlets in order to collect and deflect the air downward into theinlet. The Well-known rotatable trumpet-mouthed cap or hood used onvessels for collecting air and deflecting the current down into the holdor boiler-room of the vessel is a familiar example. These latter capsare adapted for adjustment by hand to face the wind, and hence they area source of considerable trouble and inconvenience. The desirability ofa cap which would be self-adjusting, so that it would always present itsopen mouth to the wind, however light, has no doubt been understood;but'so far as known the object has not been attained, probably owing tothe difficulty in carrying out the idea in a ventilator of sufficientsensitiveness to be acted upon by light winds and under the varyingconditions due to the rolling of the vessel and at the same time ofsufficiently strong and durable construction.

The present invention has for its object to provide a ventilating-capmore especially intended for steamships, but also well suited for otheradaptations, which is non-rotative, but which always presents itsreceiving-face to the wind, however light or gentle its on rrent may be.

In the accompanying drawings I have illustrated an embodiment of theinvention in two slightly-dilferent forms.

In the drawings, Figure 1 is a vertical axial section of one form of theventil ating-cap,and Fig. 1 is ahorizontal section of the same,taken inthe plane indicated by line 00' in Fig. 1. Figs. 2 and 2 are viewscorresponding, respectively, to Figs. 1 and 1, illustrating anotherformof the cap.

In both of the forms of the device illustrated is an upright tube orshaft, preferably cylindrical, closed at the top and open or aperturedat the sides all around. This shaft is provided with deflecting-plates Ato collect the air and deflect it into'the shaft, and

inside of the shaft there is suspended a flexible deflector B to preventthe incoming air or the major portion thereof from traversing the shaftand escaping at the opposite side thereof. The unapertured base portionof the shaft will be connected with the cover, which closes its upperend through the medium of a cylinder (3, of perforated metal, which willpermit the air to enter freely. This cylinder 0- forms, substantially, apart of the shaft.

The inner pendent deflectorB may be made of any light pliable material,such as cloth, leather, or the like.

In the form of the device illustrated in Figs. 1 and 1 the louver-likedeflectors A are horizontally arranged one above the other and are ofring-like form. To enable them to collect the air the better, they areinclined down- Ward toward the cylinder 0, to Which they are secured,the upper and outer margin of one extending up to the inner and lowermargin of that one next above. They may also be curved in outline orconcave on the under side, as shown. The inner deflector B in this formof the device is constructed like a bag.

In the form seen in Figs. 2 and 2 the deflectors A extend vertically andproject out radially, and the inner deflector B is formed of separatesuspended strips of flexible material.

It will be noted that when a wind is blowing against one face or side ofthe ventilat ing-cap it will enter the shaft and force the flexiblefreely suspended deflector B over toward and even against the oppositeside of the shaft, whereby it stops the flow of the air transverselythrough the pipe and out at the opposite side and compels it to passdownward, and as the deflector B is flexible this will happen inWhatever direction the Wind may be blowing. In case there is no Windblowing the deflector 13 leaves a free annular passage for the air toenter at.

The foraminous surface provided by the 1 cylinder 0, of perforated metalor wire-netting, serves as a bearing-surface for the flexi ble materialof the inner deflector B and pre vents the latter from chafing on theinner edges of the deflectors, and this lining C also to some extentexcludes the rain and snow.

I am aware that louver ventilating-caps are not broadly new. Myinvention resides, mainly, in the inner deflector B.

. Having thus described my invention, I claim- 5 1. In a ventilating-capfor air-inlets, the combination with the upright shaft closed at the topand having apertures for air at all sides, of an inner deflector, offlexible material suspended freely within said shaft, sub- I0 stantiallyas set forth.

2. In a ventilating-cap for air-inlets, the combination with the uprightshaft, closed at the top and having air-apertures and outer deflectorsabout its sides, of an inner deflec= r 5 tor, in the nature of a bag offlexible material ERNST AUGUST WIMAN. W'itnesses:

ERNST SVANGVIST,

B. H. STICKLER.

